FCC/Devices/Terminals/HengshanProtocolTerminal/MessageTemplateLookup.cs

using Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming;
using Edge.Core.Parser.BinaryParser;
using Edge.Core.Parser.BinaryParser.MessageEntity;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Dfs.WayneChina.HengshanPayTerminal
{
    public class MessageTemplateLookup : IMessageTemplateLookup
    {
        /// <summary>
        /// Gets the default singleton instance of type MessageTemplateLookup.
        /// </summary>
        public static MessageTemplateLookup Default { get; } = new MessageTemplateLookup();

        /// <summary>
        /// Dictionary that holds the commands and types
        /// </summary>
        private static readonly Dictionary<string, string> messageCodeToTypeStrDict = new Dictionary<string, string>();

        static MessageTemplateLookup()
        {
            messageCodeToTypeStrDict.Add("0x10", 
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.CheckCmdRequest,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x13",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.RegisterRequest,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x15",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.ValidateCardRequest,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x17",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.AuthRequest,Dfs.WayneChina.HengshanPayTerminal");
            messageCodeToTypeStrDict.Add("0x19",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.CancelAuthRequest,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x1C",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.FuelingDataRequest,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x20",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.ChangeAuthModeAck,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x21",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.QueryGrayRecordRequest,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x2D",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.TransactionDataRequest,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x30",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.PaymentRequest,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x45",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.LockOrUnlockPumpAck,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x24",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.VolumeTotal,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x25",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.DataDownloadRequest,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x27",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.DataContentRequest,Dfs.WayneChina.HengshanPayTerminal");

            messageCodeToTypeStrDict.Add("0x49",
                "Dfs.WayneChina.HengshanPayTerminal.MessageEntity.Incoming.Totalizer,Dfs.WayneChina.HengshanPayTerminal");
        }

        public MessageTemplateBase GetMessageTemplateByRawBytes(byte[] bytes)
        {
            var msgHandleCode = bytes.Skip(6).First();

            var key = "0x" + msgHandleCode.ToString("X").PadLeft(2, '0');
            if (messageCodeToTypeStrDict.ContainsKey(key))
            {
                var found = messageCodeToTypeStrDict[key];
                var targetType = Type.GetType(found);
                var targetInstance = (MessageTemplateBase)Activator.CreateInstance(targetType);
                return targetInstance;
            }
            else
            {
                throw new ArgumentException("Can't find correlated message entity type for incoming raw message bytes: " + 
                    bytes.Select(s => s.ToString("X").PadLeft(2, '0')).Aggregate((n, acc) => n + " " + acc));
            }
        }
    }
}